The articles featured herein are for informational purposes only and should not be construed as medical advice. Specific medical advice should only be obtained from a licensed health care professional. No liability is assumed by ProSource for any information herein.

The articles featured herein are for informational purposes only and should not be construed as medical advice. Specific medical advice should only be obtained from a licensed health care professional. No liability is assumed by ProSource for any information herein.

The articles featured herein are for informational purposes only and should not be construed as medical advice. Specific medical advice should only be obtained from a licensed health care professional. No liability is assumed by ProSource for any information herein.

The articles featured herein are for informational purposes only and should not be construed as medical advice. Specific medical advice should only be obtained from a licensed health care professional. No liability is assumed by ProSource for any information herein.

About ProSource

The arrival of a new ProSource Supplement Catalog is always cause for celebration among serious athletes. And rest assured, this winter’s catalog is packed with all the phenomenal savings and expert reviews of top-brand products you’ve come to expect from us.

Weight Gainers

It's common to turn to weight gainers when your fast-burning metabolism won't let you pack on quality pounds through diet alone. Weight gainers don't just fill you up with empty calories, such as low-quality ingredients or sugars, either, they contain formulations of high-quality protein blends, complex carbohydrates and healthy fats that make it easy to ingest an extra few thousand calories each day. To further increase muscle mass while minimizing fat gain, some products also include creatine, amino acids and fiber.

Super Mass Gainerby Dymatize NutritionSuper Mass Gainer—This new weight gain formula delivers a huge 1300 calories per serving, including 52 grams of quality protein, 17 grams of branched chain amino acids, 252 grams of carbs, 1.5 grams of creatine monohydrate and a full blend of vitamins and minerals.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Universal NutritionReal GainsHigh Calorie Weight GainerReal Gains is a high calorie weight gain formula consisting of 610 calories per serving. It boasts 52 grams of protein from a blend consisting of whey concentrate, micellar casein and whey isolate. Real Gains provides 87 grams of carbohydrates from maltodextrin and 6 grams of fat from flaxseed and MCT oil to help bulk you up.

100% Pure Muscle Mass
by Cutler Nutrition
High-Calorie Weight Gainer
Jay Cutler's weight gainer formulation provides 1300 calories per 4-scoop serving and is anchored by a 50-grams-per-serving dose of protein composed of whey protein concentrate, milk protein isolate, calcium caseinate, micellar casein, egg albumin, and whey protein isolate. Pure Muscle Mass also provides creatine and taurine for cell volumization, glutamine and glutamine peptides for recovery, and plenty of carbohydrates, mostly in the form of dextrin.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Muscle-Peak by Inner Armour
Powerful Unstripped Whole Protein Fractions Critical Growth Factors Intact* Whey Hydrolysates Provide The Fastest Releasing Activity of all Proteins
The MUSCLE-PEAK® ADVANTAGE: To be a great athlete you need to be able to sustain high forces (strength) at high speeds (speed X strength = power). Bigger muscles can generate more power because they are capable of producing more force at a given speed. To make your muscles work faster, stronger and more powerful you must be able to:
1. The Unstoppable Whey Hydrolysate: The World's Fastest Absorbing Protein. Studies strongly suggest that the ingestion of a fast-acting protein/amino acid hydrolysate supplement can increase amino acid levels in systemic circulation where they are available for muscle protein anabolism (growth). The more rapidly these amino acids rise in the blood, the greater the muscle building reaction. Hydrolysates like the ones found in MUSCLE-PEAK® have been shown to be the most beneficial form for bodybuilders and athletes as they absorb the fastest and therefore create the greatest spike in plasma concentration.*
2. Powerful Unstripped Whole Protein Fractions With Critical Growth Factors Intact: MUSCLE-PEAK's® unique manufacturing process retains critical bioactive lean body mass growth factors including di, tri and oligo peptides, beta-lactoglobulin, alpha-lactalbumin, serum albumin, and immunoglobulins. These critical growth factors are often stripped away in many protein supplements but their roles are of great importance as they have been shown to provide multiple growth factors including the powerful IGF-1 (insulin-like growth factor). *
3. Muscle Cell Stimulators and Your Natural Rapid Recovery Cascade: MUSCLE-PEAK® is loaded with Branched-Chain Amino Acids (BCAAs, particularly Leucine), L-Glutamine and Creatine, some of the most powerful nutrients of their kind shown in clinical studies to help stimulate muscle protein synthesis and ATP formation. Additional amino acids such as Glycine and Taurine have been added to help stimulate your Natural Rapid Recovery Cascade so your muscles can regenerate and recover faster which provides for a more favorable state for muscle growth.*
4. Lean Muscle Ratio Keeps Muscle Full And Not Flat For Hard Dense Muscles: MUSCLE-PEAK® provides an outstanding choice for staying lean but without sacrificing muscle fullness. Drinking a straight protein shake that is very low in carbs and fat can be useful for certain times but bodybuilding athletes often make the mistake of not taking in the proper ratio of macronutrients to keep their muscle lean but also full at the same time. MUSCLE-PEAK® was designed with this in mind to help keep your muscles full and not flat for hard dense muscles.

N-Large3 by PROLAB Nutrition
A COMPLETE MASS GAINING ADVANTAGE N-Large3™ provides a complete mass-gaining advantage to hard gainers and athletes looking to build serious size. The carefully selected blend of proteins, carbohydrates and lipids stack up to provide 600 muscle-building calories per serving to help even the hardest gainers to build muscle.A 45 gram, triplex blend of targeted proteins support maximum gains in three progressive stages. First, Whey Isolate begins to absorb immediately, quickly racing to fuel post-workout repletion and igniting muscle-repairing protein synthesis. Second, Whey Concentrate adds additional protein to keep the rebuilding momentum sustained. The addition of Micellar Casein takes recovery and growth to the next level. Micellar Casein is a gel forming protein that slowly digests for up to 7 hours of muscle growth support. This provides the extended amino acid flow muscles crave to build dense new fibers. Repairing, rebuilding and maintaining these muscle fibers are essential for maximizing growth and size. The amino acids supplied by the 3 stage protein blend helps promote muscle protein synthesis - the very process of building muscle fibers.60 grams of low sugar, complex carbohydrates help to pump muscles with a supply of glycogen - the premier source of fuel during high intensity weight lifting sessions. Providing a constant, readily available source of energy is required to maintain muscle mass. If the body becomes depleted of fuel, it begins tapping into it's own energy reserves - muscle. Instead of increasing and building up the muscle mass you are trying to achieve - it is being broken down and converted into energy. An added source of mass-gaining fuel is Medium Chain Triglycerides (MCTs). MCTs are not only rapidly absorbed; they are readily burned as efficient, performance driving fuel. Because MCTs are so readily metabolized for energy they help to reduce muscle protein wasting, maximizing muscular development.†* You do your part. We'll do ours.™-600 Massive Calories Feed High Metabolisms -45 grams of Protein Fuels Muscle Growth -Over 56 grams of Muscle Preserving Amino Acids -60 grams of Glycogen Replenishing Carbohydrate -Premium Lipids for Energy & Muscle Growth-A Complete Mass Gaining Advantage.

Arnold Iron Massby Arnold Schwarzenegger Series
Targeted weight gainer formulation
In a category in which too many products offer plenty of calories and too little muscle fuel, Arnold Mass Gain takes a well-considered approach to supporting real muscle growth. This weight gainer provides 40 grams per serving of hydrolyzed beef protein with added lactoferrin, plus added creatine monohydrate for cell volumization, BCAAs (L-leucine, L-valine, L-isoleucine) for recovery and D-ribose for enhanced ATP levels. In addition, Arnold Iron Mass includes complex carbohydrates in the form of sweet potato powder and barley starch, as well as a healthy fats matrix (sunflower oil, MCTs) and digestive enzymes. Arnold Iron Mass is low sugar, gluten-free and provides 485 calories per serving.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.